<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>Find position (in grapheme units) of first occurrence of a string</title>

 </head>
 <body><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.grapheme-strlen.html">grapheme_strlen</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.grapheme-strripos.html">grapheme_strripos</a></div>
 <div class="up"><a href="ref.intl.grapheme.html">Grapheme 函数</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.grapheme-strpos" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">grapheme_strpos</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.3.0, PECL intl &gt;= 1.0.0)</p><p class="refpurpose"><span class="refname">grapheme_strpos</span> &mdash; <span class="dc-title">Find position (in grapheme units) of first occurrence of a string</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.grapheme-strpos-description">
  <h3 class="title">说明</h3>
  <p class="para">过程化风格</p>
  <div class="methodsynopsis dc-description">
   <span class="type">int</span> <span class="methodname"><strong>grapheme_strpos</strong></span>
    ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$haystack</code></span>
   , <span class="methodparam"><span class="type">string</span> <code class="parameter">$needle</code></span>
   [, <span class="methodparam"><span class="type">int</span> <code class="parameter">$offset</code><span class="initializer"> = 0</span></span>
  ] )</div>

  <p class="para rdfs-comment">
   Find position (in grapheme units) of first occurrence of a string
  </p> 
  </div>


 <div class="refsect1 parameters" id="refsect1-function.grapheme-strpos-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">haystack</code></em></dt>

     <dd>

      <p class="para">
       The string to look in. Must be valid UTF-8.
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">needle</code></em></dt>

     <dd>

      <p class="para">
       The string to look for. Must be valid UTF-8.
      </p>
     </dd>

    
    
     <dt>
<em><code class="parameter">offset</code></em></dt>

     <dd>

      <p class="para">
       The optional $offset parameter allows you to specify where in $haystack to
       start searching as an offset in grapheme units (not bytes or characters).
       The position returned is still relative to the beginning of haystack
       regardless of the value of $offset.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

   
 
 <div class="refsect1 returnvalues" id="refsect1-function.grapheme-strpos-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the position as an integer. If needle is not found, strpos() will return boolean FALSE.   
  </p>
 </div>

 
 <div class="refsect1 examples" id="refsect1-function.grapheme-strpos-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-2617">
   <p><strong>Example #1 <span class="function"><strong>grapheme_strpos()</strong></span> example</strong></p>
   <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />$char_a_ring_nfd&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"a\xCC\x8A"</span><span style="color: #007700">;&nbsp;&nbsp;</span><span style="color: #FF8000">//&nbsp;'LATIN&nbsp;SMALL&nbsp;LETTER&nbsp;A&nbsp;WITH&nbsp;RING&nbsp;ABOVE'&nbsp;(U+00E5)&nbsp;normalization&nbsp;form&nbsp;"D"<br /></span><span style="color: #0000BB">$char_o_diaeresis_nfd&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"o\xCC\x88"</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;'LATIN&nbsp;SMALL&nbsp;LETTER&nbsp;O&nbsp;WITH&nbsp;DIAERESIS'&nbsp;(U+00F6)&nbsp;normalization&nbsp;form&nbsp;"D"<br /><br /></span><span style="color: #007700">print&nbsp;</span><span style="color: #0000BB">grapheme_strpos</span><span style="color: #007700">(&nbsp;</span><span style="color: #0000BB">$char_a_ring_nfd&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$char_a_ring_nfd&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$char_o_diaeresis_nfd</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$char_o_diaeresis_nfd</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
   </div>

  </div>
  <p class="para">以上例程会输出：</p>
  <div class="example-contents screen">
<div class="cdata"><pre>
2
</pre></div>
  </div>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.grapheme-strpos-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.grapheme-stripos.html" class="function" rel="rdfs-seeAlso">grapheme_stripos()</a> - Find position (in grapheme units) of first occurrence of a case-insensitive string</span></li>
    <li class="member"><span class="function"><a href="function.grapheme-stristr.html" class="function" rel="rdfs-seeAlso">grapheme_stristr()</a> - Returns part of haystack string from the first occurrence of case-insensitive needle to the end of haystack.</span></li>
    <li class="member"><span class="function"><a href="function.grapheme-strripos.html" class="function" rel="rdfs-seeAlso">grapheme_strripos()</a> - Find position (in grapheme units) of last occurrence of a case-insensitive string</span></li>
    <li class="member"><span class="function"><a href="function.grapheme-strrpos.html" class="function" rel="rdfs-seeAlso">grapheme_strrpos()</a> - Find position (in grapheme units) of last occurrence of a string</span></li>
    <li class="member"><span class="function"><a href="function.grapheme-strstr.html" class="function" rel="rdfs-seeAlso">grapheme_strstr()</a> - Returns part of haystack string from the first occurrence of needle to the end of haystack.</span></li>
    <li class="member">
     <a href="http://unicode.org/reports/tr29/#Grapheme_Cluster_Boundaries" class="link external">&raquo;&nbsp;
      Unicode Text Segmentation: Grapheme Cluster Boundaries
     </a>
    </li>
   </ul>
  </p>
 </div>

</div><hr /><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.grapheme-strlen.html">grapheme_strlen</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.grapheme-strripos.html">grapheme_strripos</a></div>
 <div class="up"><a href="ref.intl.grapheme.html">Grapheme 函数</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
